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What cause temperature sensor light to come on

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Indicates of over heated,

Posted on Oct 28, 2012

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What does code P 119 mean on my Cadillac 1994 Seville STS


P0119 Cadillac Engine Coolant Temperature Circuit Intermittent
Possible causes - Low engine coolant level
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection What about the obd code? The Engine Control Module (ECM) detected an erratic signal from the engine Coolant Temperature (ECT) sensor during the system monitor test Symptoms - Engine Light ON (or Service Engine Soon Warning Light) P0119 Cadillac Description The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
P119 or P0119 ?

P119 - Shorted Fuel Injector Problem
or

Feb 18, 2016 | Cadillac Cars & Trucks

1 Answer

How to fix codes p195 on 2004 lincoln ls 3.0


Generic OBD Error Code Details for P0195 Engine Oil Temperature Sensor What does this mean? OBD Code P0195refers to
The Engine Oil Temperature (EOT) sensor is a thermistor device in which resistance changes with temperature. The electrical resistance of a thermistor decreases as the temperature increases and the resistance increases as the temperature decreases. The varying resistance affects the voltage drop across the sensor terminals and provides electrical signal to the Powertrain Control Module (PCM) corresponding to temperature. Thermistor-type sensors are considered passive sensor. A passive sensor is connected to a voltage divider network so that varying the resistance of the passive sensor causes a variation in total current flow. Voltage that is dropped across a fixed resistor in a series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor. The EOT sensor measures the temperature of the engine oil. The sensor is typically threaded into the engine oil lubrication system. The PCM can use the EOT sensor input to determine the following: - On variable cam timing (VCT) applications the EOT input is used to adjust the VCT control gains and logic for camshaft timing. - The PCM can use the EOT sensor input in conjunction with other PCM inputs to determine oil degradation - The PCM can use EOT sensor input to initiate a soft engine shutdown. To prevent engine damage from occurring as a result of high oil temperature, the PCM has the ability to initiate a soft engine shutdown. Whenever engine RPM exceeds a calibrated level for a certain period of time, the PCM will begin reducing power by disabling engine cylinders. Symptoms Possible sumptoms of OBD code P0195
- Engine Light ON (or Service Engine Soon Warning Light) Causes Possible causes of OBD code P0195
- Engine not at operating temperature. - Cooling system problem of stuck thermostat. - EOT circuit failure. - Bad EOT sensor - Damaged PCM.

Nov 15, 2015 | Lincoln Cars & Trucks

1 Answer

Undefinedas replacement on civic 98 sensor p0113


Possible causes for this code are: - Faulty Intake Air Temperature (IAT) sensor
- Dirty air filter
- Intake Air Temperature (IAT) sensor harness is open or shorted
- Intake Air Temperature (IAT) sensor circuit poor electrical connection. this code sets when: - An excessively high voltage from the sensor is sent to ECM. Usual Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light) P0113 1998 Honda Civic Description The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.
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Sep 24, 2014 | 1998 Honda Civic

1 Answer

Trouble codes p0118 temperature po118


code p0118 refers to engine coolant temperature (ETC) sensor ---circuit malfunction===causes---coolant thermostat---wiring open circuit/short to positive---wiring short to ground---ground wire defective---ECT sensor.. The temp gauge works off a temperature sender unit separate to the coolant sensor and if it is reading 100 then it indicates an overheat situation in the engine . Probably why the engine light is coming on. As the thermostat is in the list of causes I would replace it as a precaution. The coolant sensor is what tells the CPU to turn on the electric fans to cool the radiator

Jan 13, 2014 | 2004 GMC Envoy

1 Answer

Code 1 senser P0118 on a 2004 V.W beetle dicesel


P0118 for Volkswagen - (ECT) Engine Colant Temperature Circuit High

Symptoms:- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes:
(Inspect the following... Repair/Replace if necessary)
- Low engine coolant level
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat

P0118 VOLKSWAGEN Description: The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the (ECM) as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
When is the code detected?:When an excessively high voltage from the sensor is sent to ECM.

I hope this helps! Let me know if you need further assistance.

Mar 08, 2012 | Mercedes-Benz C Cars & Trucks

2 Answers

Obd code po183


Google bod code P0183 and this will tell you the answer

Oct 24, 2011 | 2005 Nissan Pathfinder

1 Answer

Trac off light comes on & then car shifts hard. When we shut it off & then re-start it, it works fine. Any ideas?


Youll need to scan for transmission codes. the trac off light is a default of the trans going into a default safety mode. Bad speed sensors and simple little bolt on items like that can cause this problem.-------- But as you mentioned in your question that " When we shut it off & then re-start it, it works fine." this indicates that computer gets reset when you turn car on off. so there is error code stored, but its getting reset.Get the car scanned at autozone service center or at local car garage and retrieve the error codes, that will point towards the cause of the problem.------- Mostly its ABS wheel sensors causing the problem.----------- Also other possibility for this trac light coming on and car hard shifting is problem with iat sensor or problem with tps sensor.------- The Intake Air Temperature (IAT) sensor determines the air temperature inside the intake manifold. Resistance changes in response to the ambient air temperature. The sensor has a negative temperature coefficient. As the temperature of the sensor rises the resistance across the sensor decreases. This provides a signal to the PCM indicating the temperature of the incoming air charge. This sensor helps the PCM to determine spark timing and air/fuel ratio. Information from this sensor is added to the pressure sensor information to calculate the air mass being sent to the cylinders. The IAT is a two wire sensor, a 5-volt reference signal is sent to the sensor and the signal return is based upon the change in the measured resistance due to temperature.The IAT sensor is located in the air cleaner outlet tube.--------- The throttle position sensor, also called the TP sensor, helps to regulate the throttle position on a car's engine. A faulty TP sensor can cause an illuminated check engine light in your Cavalier, as well as cause the engine to run inefficiently. Replacing the TP sensor is simple, quick and inexpensive.
Locate the throttle position sensor. The sensor is attached to the rear of the throttle body. Disconnect the electrical connection from the sensor.
Pull the throttle position sensor off; you may have to wiggle it back and forth to remove it.-------
---------------------- So first get car scanned at car diagnosis center, and get error code.The error code will exactly point, which part is causing the problem.But if in case no error code is retrieved, then this possible parts mentioned needs to be tested and faulty one will have to be replaced.----------- This will help, thanks.Helpmech.

Aug 25, 2011 | 2002 Chevrolet Cavalier Coupe

1 Answer

I HAVE A PO125 AND PO650 FAILURE CODE


P0125 - Insufficient Coolant Temperature for Closed Loop Fuel Control Possible causes - Harness or connectors (The sensor circuit is open or shorted.)
- Engine coolant temperature sensor may be faulty
- Thermostat may be fault (most common cause)

P0650 - Malfunction Indicator Lamp Control Circuit Malfunction (Check Engine light)

Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
Possible causes - Harness or connectors for the MIL (Check Engine Light) circuit is open or shorted
- MIL bulb may be faulty
- Faulty ECM

Mar 02, 2011 | 2000 Oldsmobile Alero

2 Answers

What makes the cooling fan come on even though my 95 z28 is not hot


A bad relay that is sticking closed causing the fan to come on or a bad coolant temperature sending unit or switch which is telling the relay to go on when not hot.

Nov 06, 2010 | 1995 Chevrolet Camaro

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